Originally Posted by Cab_Burge
Awfully hard to read a used plug, try installing two new ones in #2 and in #7 and then make a WOT for 10+ seconds and shut it off clean and show us those plugs twocents scope up

iagree If these plugs weren't new and used only for the WOT blast, they won't tell you much of anything.

CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax